oj.uz

Submission #280266

# Submission time Handle Problem Language Result Execution time Memory
280266 2020-08-22T15:19:21 Z Haunted_Cpp Hotspot (NOI17_hotspot) C++17
38 / 100
 28 ms 1032 KB 
/**
 *  author: Haunted_Cpp
**/
 
#include <bits/stdc++.h>
using namespace std;
 
#pragma GCC optimize("Ofast")
#pragma GCC target("fma,sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,avx2,tune=native")
#pragma GCC optimize("unroll-loops")
 
template<typename T> ostream &operator << (ostream &os, const vector<T> &v) { os << '{'; string sep; for (const auto &x : v) os << sep << x, sep = ", "; return os << '}'; }
template<typename T, size_t size> ostream &operator << (ostream &os, const array<T, size> &arr) { os << '{'; string sep; for (const auto &x : arr) os << sep << x, sep = ", "; return os << '}'; }
template<typename A, typename B> ostream &operator << (ostream &os, const pair<A, B> &p) { return os << '(' << p.first << ", " << p.second << ')'; }
 
void debug_out() { cerr << endl; }
template<typename Head, typename... Tail> void debug_out(Head H, Tail... T) { cerr << ' ' << H; debug_out(T...); }
 
#ifdef LOCAL
#define debug(...) cerr << "(" << #__VA_ARGS__ << "):", debug_out(__VA_ARGS__)
#else
#define debug(...) 47
#endif

const int MAX_N = 5000 + 5;
const int MAX_K = 2000 + 5;

vector<vector<int>> g(MAX_N);
vector<long double> ans(MAX_N); 

int solve(int node, int target, const vector<vector<int>> &dag, vector<int> &dp) {
  if (node == target) return 1;
  int &res = dp[node];
  if (~res) return res;
  res = 0;
  for (auto to : dag[node]) {
    res += solve(to, target, dag, dp);
  }
  return res;
}

int main() {
  ios::sync_with_stdio(0);
  cin.tie(0); 
  int n, m;
  cin >> n >> m;
  for (int i = 0; i < m; i++) {
    int st, et;
    cin >> st >> et;
    g[st].emplace_back(et);
    g[et].emplace_back(st);
  }
  auto bfs = [&](int source, int sink) {
    queue<int> q;
    vector<int> dist(n, 1e9);
    dist[sink] = 0;
    q.push(sink);
    while(!q.empty()) {
      int node = q.front();
      q.pop();
      for (auto to : g[node]) {
        if (dist[to] > dist[node] + 1) {
          dist[to] = dist[node] + 1;
          q.push(to);
        }
      }
    }
    vector<vector<int>> dag(MAX_N);
    function<void(int)> build_dag = [&](int node) {
      const int cur = dist[node];
      for (auto to : g[node]) {
        if (dist[to] == cur - 1) {
          dag[node].emplace_back(to);
          build_dag(to);
        }
      }
    };
    build_dag(source);
    return dag;
  };
  int k;
  cin >> k;
  while(k--) {
    int source, sink;
    cin >> source >> sink;
    vector<vector<int>> a = bfs(source, sink);
    vector<int> dp_a(MAX_N, -1);
    vector<vector<int>> b = bfs(sink, source);
    vector<int> dp_b(MAX_N, -1);
    const int cnt_shortest = solve(source, sink, a, dp_a);
    if (cnt_shortest == 0) continue;
    for (int i = 0; i < n; i++) {
      int L = solve(i, sink, a, dp_a);
      int R = solve(i, source, b, dp_b);
      //~ debug(L * R, cnt_shortest);
      ans[i] += (long double) L * R / cnt_shortest;
    }
  }
  //~ for (int i = 0; i < n; i++) cout << ans[i] << '\n';
  cout << (max_element(ans.begin(), ans.end()) - ans.begin()) << '\n';
  return 0;
}

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 896 KB Output is correct
2 Correct 1 ms 896 KB Output is correct
3 Correct 1 ms 896 KB Output is correct
4 Correct 1 ms 768 KB Output is correct
5 Correct 1 ms 768 KB Output is correct
6 Correct 1 ms 768 KB Output is correct
7 Correct 1 ms 896 KB Output is correct

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 896 KB Output is correct
2 Correct 1 ms 896 KB Output is correct
3 Correct 1 ms 896 KB Output is correct
4 Correct 1 ms 768 KB Output is correct
5 Correct 1 ms 768 KB Output is correct
6 Correct 1 ms 768 KB Output is correct
7 Correct 1 ms 896 KB Output is correct
8 Correct 1 ms 768 KB Output is correct
9 Correct 1 ms 768 KB Output is correct
10 Correct 1 ms 768 KB Output is correct
11 Correct 1 ms 768 KB Output is correct
12 Correct 1 ms 768 KB Output is correct
13 Correct 1 ms 768 KB Output is correct
14 Correct 1 ms 768 KB Output is correct

Subtask #3
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 896 KB Output is correct
2 Correct 1 ms 896 KB Output is correct
3 Correct 1 ms 896 KB Output is correct
4 Correct 1 ms 768 KB Output is correct
5 Correct 1 ms 768 KB Output is correct
6 Correct 1 ms 768 KB Output is correct
7 Correct 1 ms 896 KB Output is correct
8 Correct 9 ms 1032 KB Output is correct
9 Correct 15 ms 968 KB Output is correct
10 Correct 12 ms 960 KB Output is correct
11 Correct 18 ms 1000 KB Output is correct
12 Correct 14 ms 872 KB Output is correct
13 Correct 15 ms 956 KB Output is correct
14 Correct 25 ms 920 KB Output is correct

Subtask #4
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 896 KB Output is correct
2 Correct 1 ms 896 KB Output is correct
3 Correct 1 ms 896 KB Output is correct
4 Correct 1 ms 768 KB Output is correct
5 Correct 1 ms 768 KB Output is correct
6 Correct 1 ms 768 KB Output is correct
7 Correct 1 ms 896 KB Output is correct
8 Correct 1 ms 768 KB Output is correct
9 Correct 1 ms 768 KB Output is correct
10 Correct 1 ms 768 KB Output is correct
11 Correct 1 ms 768 KB Output is correct
12 Correct 1 ms 768 KB Output is correct
13 Correct 1 ms 768 KB Output is correct
14 Correct 1 ms 768 KB Output is correct
15 Correct 9 ms 1032 KB Output is correct
16 Correct 15 ms 968 KB Output is correct
17 Correct 12 ms 960 KB Output is correct
18 Correct 18 ms 1000 KB Output is correct
19 Correct 14 ms 872 KB Output is correct
20 Correct 15 ms 956 KB Output is correct
21 Correct 25 ms 920 KB Output is correct
22 Correct 7 ms 880 KB Output is correct
23 Correct 8 ms 872 KB Output is correct
24 Correct 15 ms 880 KB Output is correct
25 Correct 21 ms 896 KB Output is correct
26 Correct 22 ms 892 KB Output is correct
27 Correct 19 ms 864 KB Output is correct
28 Correct 28 ms 880 KB Output is correct

Subtask #5
0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 896 KB Output is correct
2 Correct 1 ms 896 KB Output is correct
3 Correct 1 ms 896 KB Output is correct
4 Correct 1 ms 768 KB Output is correct
5 Correct 1 ms 768 KB Output is correct
6 Correct 1 ms 768 KB Output is correct
7 Correct 1 ms 896 KB Output is correct
8 Correct 1 ms 768 KB Output is correct
9 Correct 1 ms 768 KB Output is correct
10 Correct 1 ms 768 KB Output is correct
11 Correct 1 ms 768 KB Output is correct
12 Correct 1 ms 768 KB Output is correct
13 Correct 1 ms 768 KB Output is correct
14 Correct 1 ms 768 KB Output is correct
15 Correct 3 ms 1004 KB Output is correct
16 Correct 2 ms 896 KB Output is correct
17 Correct 10 ms 1004 KB Output is correct
18 Incorrect 6 ms 932 KB Output isn't correct
19 Halted 0 ms 0 KB -

Subtask #6
0 / 36.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 896 KB Output is correct
2 Correct 1 ms 896 KB Output is correct
3 Correct 1 ms 896 KB Output is correct
4 Correct 1 ms 768 KB Output is correct
5 Correct 1 ms 768 KB Output is correct
6 Correct 1 ms 768 KB Output is correct
7 Correct 1 ms 896 KB Output is correct
8 Correct 1 ms 768 KB Output is correct
9 Correct 1 ms 768 KB Output is correct
10 Correct 1 ms 768 KB Output is correct
11 Correct 1 ms 768 KB Output is correct
12 Correct 1 ms 768 KB Output is correct
13 Correct 1 ms 768 KB Output is correct
14 Correct 1 ms 768 KB Output is correct
15 Correct 9 ms 1032 KB Output is correct
16 Correct 15 ms 968 KB Output is correct
17 Correct 12 ms 960 KB Output is correct
18 Correct 18 ms 1000 KB Output is correct
19 Correct 14 ms 872 KB Output is correct
20 Correct 15 ms 956 KB Output is correct
21 Correct 25 ms 920 KB Output is correct
22 Correct 7 ms 880 KB Output is correct
23 Correct 8 ms 872 KB Output is correct
24 Correct 15 ms 880 KB Output is correct
25 Correct 21 ms 896 KB Output is correct
26 Correct 22 ms 892 KB Output is correct
27 Correct 19 ms 864 KB Output is correct
28 Correct 28 ms 880 KB Output is correct
29 Correct 3 ms 1004 KB Output is correct
30 Correct 2 ms 896 KB Output is correct
31 Correct 10 ms 1004 KB Output is correct
32 Incorrect 6 ms 932 KB Output isn't correct
33 Halted 0 ms 0 KB -